Bacteriophage Therapy for Staphylococcus Lugdunensis Prosthetic Joint Infection

March 4, 2026 updated by: University of Calgary
This is a single-patient, phase I/II clinical trial that aims to evaluate the potential of a bacteriophage drug product to treat and prevent the recurrence of a Staphylococcus lugdunensis prosthetic joint infection of the hip. The patient has exhausted all conventional therapies, both surgical and medical, at considerable detriment to their quality of life. The treatment involves 2 intra-articular injections of bacteriophages into the joint and surrounding area and 14 days of intravenous phage therapy. The goal is to eliminate the infection and prevent further complications, providing a potential new treatment avenue for patients with difficult-to-treat infections.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

1

Phase

  • Phase 2
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

  • Name: Teresa Nguyen
  • Phone Number: 403-536-3725

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Diagnosis of active chronic prosthetic joint infection
  • Causative bacteria is susceptible to bacteriophage therapy in vitro
  • History of multiple failed antibiotic and surgical interventions

Exclusion Criteria:

  • Stage 5 chronic kidney disease
  • Cirrhosis
  • A known allergy to phage products
  • Fever
  • Involvement in another clinical trial
  • Pregnancy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Bacteriophage drug product
Five phage anti-Staphylococcus aureus bacteriophage cocktail
Biological: Five phage anti-Staphylococcus aureus bacteriophage cocktail
Five phage anti-Staphylococcus aureus bacteriophage cocktail for targeted treatment of a Staphylococcus lugdunensis infection.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Clinical response to phage therapy as determined by participant's absence of physical clinical symptoms including wound drainage, swelling, erythema, pain, and fever.
Time Frame: 1 year
Resolution of the infection, indicated by the absence of physical clinical symptoms including wound drainage, swelling, erythema, pain, and fever. The infection will be considered to be resolved if these physical clinical symptoms are absent.
1 year

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Safety and tolerability of phage therapy determined by incidence of treatment-emergent adverse events
Time Frame: 29 days
The safety outcome focuses on monitoring and documenting any adverse events (both serious and not) or reactions associated with bacteriophage therapy. Key safety measures include observing for immediate allergic reactions during the first dose, conducting regular clinical assessments, and performing routine bloodwork to detect any potential organ damage or unexpected side effects.
29 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Calgary

Collaborators

Qeen Biotechnologies

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

March 1, 2026

Primary Completion (Estimated)

March 1, 2027

Study Completion (Estimated)

March 1, 2027

Study Registration Dates

First Submitted

February 26, 2026

First Submitted That Met QC Criteria

March 4, 2026

First Posted (Actual)

March 10, 2026

Study Record Updates

Last Update Posted (Actual)

March 10, 2026

Last Update Submitted That Met QC Criteria

March 4, 2026

Last Verified

February 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • REB26-0079

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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